Questions
A man suffering from myopia can read a book placed at 10 cm distance. For reading the book at a distance of 60 cm with relaxed vision, focal length of the lens required will be
a
45 cm
b
-20 cm
c
-12 cm
d
30 cm
detailed solution
Correct option is C
For lens u = wants to see = - 60 cm v = can see = -10 cm∴1f=1v−1u⇒1f=1−10−1−60⇒f=−12cmTalk to our academic expert!
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